\begin{tikzpicture}[scale=2]
  \clip (-1.5,-0.4) rectangle (1.5,1.5);
  \draw[step=.5cm,gray,very thin] (-1.4,-1.4) grid (1.4,1.4);
  \draw[->] (-1.5,0) -- (1.5,0);
  \draw[->] (0,-1.5) -- (0,1.5);
  \fill (1.3,1.1) circle (0.8pt) node[above]{$P$};
  \draw[red,line width=1pt, ->] (0,0) node[below left, black] {$O$} -- (1.3,1.1) node[midway, above, black] {$\ve v$};    
\end{tikzpicture}
